Value of the free triiodothyronine index.
D006801:Humans; D013974:Thyroxine / Q000097:blood; D013975:Thyroxine-Binding Proteins / Q000032:analysis; D014284:Triiodothyronine / Q000097:blood*
D013975:Thyroxine-Binding Proteins; D014284:Triiodothyronine; D013974:Thyroxine